Formation of Inorganic Thin Films on Plastics by the Sol-Gel Method
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概要
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Al-, Ti-and Zr-alkoxide solutions were dip-coated on plastic sheets such as polycarbonate (PC), polypropylene (PP), poly (vinyl chloride), polyacetal and polyimid, followed by heating to form transparent inorganic films. Films were homorogeneous and were tightly adhered on the plastic substrates, although many microcracks were obsreved. IR and XRD results showed that films consisted of amorphous metal oxide or hydroxide (Ti0<SUB>2</SUB>, Zr0<SUB>2</SUB> or AL00H) containing of OH and a small amount of organic substance. Films prepared from Ti-alkoxide solution had a maximum tensile shear adhesive strength of 4. 4 kgf/cm<SUP>2</SUP> on PP. The film on PC, which increased stability of PC against UV-light irradiation, showed adhesive strength higher than 14 kgf/cm<SUP>2</SUP>. ESCA results of films prepared from Ti-alkoxide solution indicated a different composition between film surface and film/plastic interface. The increased adhesive strength for PP was explained from the ESCA results.
- Japan Society of Colour Materialの論文